Identify specific compatibility requirements, including supported devices, operating systems, browsers, and versions, based on the target audience. This ensures the testing covers all essential platforms where the application will be used.

Set up testing environments that replicate the identified configurations, using physical devices, virtual machines, emulators, or cloud-based testing tools. This setup helps accurately simulate real-world conditions for comprehensive coverage.

Develop test cases focused on key interactions, functionality, and performance across different platforms. These scenarios include UI consistency, responsiveness, and key functionalities to ensure a smooth experience regardless of device or browser.

Execute tests across various browsers and versions to verify that the application’s design, layout, and features perform correctly. This step ensures consistent appearance and functionality, covering popular browsers like Chrome, Firefox, Safari, and Edge.

Test the application on different devices, including desktops, smartphones, and tablets, to ensure it operates seamlessly across screen sizes and resolutions. This stage verifies responsiveness and adaptability for a consistent user experience on any device.

Run tests on various operating systems, such as Windows, macOS, Android, and iOS, to confirm compatibility. This includes checking that key features, performance, and design elements work as intended on each OS.

Simulate different network conditions (e.g., WiFi, 3G, 4G, offline mode) to ensure the application functions correctly regardless of connectivity. This testing step ensures features like loading speed, data synchronization, and offline handling operate smoothly.

Record any issues encountered during testing, including platform-specific bugs, layout inconsistencies, or performance discrepancies. Documenting these findings allows for targeted fixes and further refinement of the application.

Collaborate with development teams to resolve identified issues, making the necessary adjustments for compatibility. Re-run tests on affected platforms to confirm that updates resolve the issues and ensure consistent performance.

As the application evolves, continuously update the compatibility testing process to cover new devices, OS updates, and browser versions. This ensures that the app maintains compatibility with the latest technologies and remains reliable over time.